Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc

Pull sparc updates from David Miller:

 1) Add missing cmpxchg64() for 32-bit sparc.

 2) Timer conversions from Allen Pais and Kees Cook.

 3) vDSO support, from Nagarathnam Muthusamy.

 4) Fix sparc64 huge page table walks based upon bug report by Al Viro,
    from Nitin Gupta.

 5) Optimized fls() for T4 and above, from Vijay Kumar.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Fix page table walk for PUD hugepages
  sparc64: Convert timers to user timer_setup()
  sparc64: convert mdesc_handle.refcnt from atomic_t to refcount_t
  sparc/led: Convert timers to use timer_setup()
  sparc64: Use sparc optimized fls and __fls for T4 and above
  sparc64: SPARC optimized __fls function
  sparc64: SPARC optimized fls function
  sparc64: Define SPARC default __fls function
  sparc64: Define SPARC default fls function
  vDSO for sparc
  sparc32: Add cmpxchg64().
  sbus: char: Move D7S_MINOR to include/linux/miscdevice.h
  sparc: time: Remove unneeded linux/miscdevice.h include
  sparc64: mmu_context: Add missing include files

1 files changed, 143 insertions, 0 deletions

diff --git a/arch/sparc/vdso/vdso2c.h b/arch/sparc/vdso/vdso2c.h
new file mode 100644
index 000000000000..808decb0f7be
--- /dev/null
+++ b/arch/sparc/vdso/vdso2c.h
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2017 Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * This file is included up to twice from vdso2c.c.  It generates code for
+ * 32-bit and 64-bit vDSOs.  We will eventually need both for 64-bit builds,
+ * since 32-bit vDSOs will then be built for 32-bit userspace.
+ */
+
+static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
+			 void *stripped_addr, size_t stripped_len,
+			 FILE *outfile, const char *name)
+{
+	int found_load = 0;
+	unsigned long load_size = -1;  /* Work around bogus warning */
+	unsigned long mapping_size;
+	int i;
+	unsigned long j;
+
+	ELF(Shdr) *symtab_hdr = NULL, *strtab_hdr;
+	ELF(Ehdr) *hdr = (ELF(Ehdr) *)raw_addr;
+	ELF(Dyn) *dyn = 0, *dyn_end = 0;
+	INT_BITS syms[NSYMS] = {};
+
+	ELF(Phdr) *pt = (ELF(Phdr) *)(raw_addr + GET_BE(&hdr->e_phoff));
+
+	/* Walk the segment table. */
+	for (i = 0; i < GET_BE(&hdr->e_phnum); i++) {
+		if (GET_BE(&pt[i].p_type) == PT_LOAD) {
+			if (found_load)
+				fail("multiple PT_LOAD segs\n");
+
+			if (GET_BE(&pt[i].p_offset) != 0 ||
+			    GET_BE(&pt[i].p_vaddr) != 0)
+				fail("PT_LOAD in wrong place\n");
+
+			if (GET_BE(&pt[i].p_memsz) != GET_BE(&pt[i].p_filesz))
+				fail("cannot handle memsz != filesz\n");
+
+			load_size = GET_BE(&pt[i].p_memsz);
+			found_load = 1;
+		} else if (GET_BE(&pt[i].p_type) == PT_DYNAMIC) {
+			dyn = raw_addr + GET_BE(&pt[i].p_offset);
+			dyn_end = raw_addr + GET_BE(&pt[i].p_offset) +
+				GET_BE(&pt[i].p_memsz);
+		}
+	}
+	if (!found_load)
+		fail("no PT_LOAD seg\n");
+
+	if (stripped_len < load_size)
+		fail("stripped input is too short\n");
+
+	/* Walk the dynamic table */
+	for (i = 0; dyn + i < dyn_end &&
+		     GET_BE(&dyn[i].d_tag) != DT_NULL; i++) {
+		typeof(dyn[i].d_tag) tag = GET_BE(&dyn[i].d_tag);
+		typeof(dyn[i].d_un.d_val) val = GET_BE(&dyn[i].d_un.d_val);
+
+		if ((tag == DT_RELSZ || tag == DT_RELASZ) && (val != 0))
+			fail("vdso image contains dynamic relocations\n");
+	}
+
+	/* Walk the section table */
+	for (i = 0; i < GET_BE(&hdr->e_shnum); i++) {
+		ELF(Shdr) *sh = raw_addr + GET_BE(&hdr->e_shoff) +
+			GET_BE(&hdr->e_shentsize) * i;
+		if (GET_BE(&sh->sh_type) == SHT_SYMTAB)
+			symtab_hdr = sh;
+	}
+
+	if (!symtab_hdr)
+		fail("no symbol table\n");
+
+	strtab_hdr = raw_addr + GET_BE(&hdr->e_shoff) +
+		GET_BE(&hdr->e_shentsize) * GET_BE(&symtab_hdr->sh_link);
+
+	/* Walk the symbol table */
+	for (i = 0;
+	     i < GET_BE(&symtab_hdr->sh_size) / GET_BE(&symtab_hdr->sh_entsize);
+	     i++) {
+		int k;
+
+		ELF(Sym) *sym = raw_addr + GET_BE(&symtab_hdr->sh_offset) +
+			GET_BE(&symtab_hdr->sh_entsize) * i;
+		const char *name = raw_addr + GET_BE(&strtab_hdr->sh_offset) +
+			GET_BE(&sym->st_name);
+
+		for (k = 0; k < NSYMS; k++) {
+			if (!strcmp(name, required_syms[k].name)) {
+				if (syms[k]) {
+					fail("duplicate symbol %s\n",
+					     required_syms[k].name);
+				}
+
+				/*
+				 * Careful: we use negative addresses, but
+				 * st_value is unsigned, so we rely
+				 * on syms[k] being a signed type of the
+				 * correct width.
+				 */
+				syms[k] = GET_BE(&sym->st_value);
+			}
+		}
+	}
+
+	/* Validate mapping addresses. */
+	if (syms[sym_vvar_start] % 8192)
+		fail("vvar_begin must be a multiple of 8192\n");
+
+	if (!name) {
+		fwrite(stripped_addr, stripped_len, 1, outfile);
+		return;
+	}
+
+	mapping_size = (stripped_len + 8191) / 8192 * 8192;
+
+	fprintf(outfile, "/* AUTOMATICALLY GENERATED -- DO NOT EDIT */\n\n");
+	fprintf(outfile, "#include <linux/cache.h>\n");
+	fprintf(outfile, "#include <asm/vdso.h>\n");
+	fprintf(outfile, "\n");
+	fprintf(outfile,
+		"static unsigned char raw_data[%lu] __ro_after_init __aligned(8192)= {",
+		mapping_size);
+	for (j = 0; j < stripped_len; j++) {
+		if (j % 10 == 0)
+			fprintf(outfile, "\n\t");
+		fprintf(outfile, "0x%02X, ",
+			(int)((unsigned char *)stripped_addr)[j]);
+	}
+	fprintf(outfile, "\n};\n\n");
+
+	fprintf(outfile, "const struct vdso_image %s_builtin = {\n", name);
+	fprintf(outfile, "\t.data = raw_data,\n");
+	fprintf(outfile, "\t.size = %lu,\n", mapping_size);
+	for (i = 0; i < NSYMS; i++) {
+		if (required_syms[i].export && syms[i])
+			fprintf(outfile, "\t.sym_%s = %" PRIi64 ",\n",
+				required_syms[i].name, (int64_t)syms[i]);
+	}
+	fprintf(outfile, "};\n");
+}